The micro plastic gearmotor’s output shaft is compatible with our 14 mm wheels. We do not have any brackets for this gearmotor, and it generally does not possess any installation holes, but its small size makes it easy to fasten with tape or glue. Alternatively, since this gearmotor can be Micro Planetary Gear Motor nearly the same size as a 1/4″ fuse, it can be mounted using regular 1/4″ (6 mm) fuse clips.
The next diagram shows the micro plastic gearmotor dimensions in mm. The planetary gearbox has a D-shaped plastic result shaft, which is 2 mm in diameter with a section that’s flattened by 0.5 mm. The “D” portion of the shaft can be 2.5 mm long. The motor actions 6 mm in diameter and 9 mm long, and the gearbox length, labeled “L” in the diagram below, depends on the gear ratio. The 26:1 gearbox is certainly 7.1 mm long, while the 136:1 option measures 9.4 mm. The engine leads come with their ideas pre-stripped and extend around 2 cm (0.8″) from the trunk of the motor.
Since the gearmotor’s output shaft is nylon, there may be small variances in the diameter from unit to unit. These variations may cause press-fit attachments like our 14 mm wheel to fit loosely in some instances. If you experience a loose fitting, you could attempt swapping wheels or using a small dab of glue to help hold the wheel on.